510 Sax: FERTILIZATION IN FRITILLARIA PUDICA 
their curved or coiled shape for some time and in many instances 
it is probable that they never lose their coiled or curved shape 
during migration. When the male nucleus escapes near the 
nucleus with which it is about to fuse, which is always true in 
the case of the egg, it is probable that it seldom loses its coiled 
shape, although cases were observed: where it was practically 
straightened out. The male nucleus going to the upper polar 
nucleus is more frequently straightened out than is the case with 
the one going to the egg nucleus, probably due to the greater dist- 
ance it has to travel. 
A clear example of the male nucleus going to the upper polar 
nucleus is shown in Fic. 2. The upper polar nucleus is at the 
right of the ‘“Endospermanlage.’’ The free male nucleus is 
distinctly pointed at one end and is curved in a manner that 
gives it the appearance of motility. The end toward the upper 
polar nucleus is larger, rounded and tapers slightly toward the 
middle, where it forms a short rounded arch, and then curves to 
one side and tapers to a point. 
Fic. 1 shows almost all of the contents of the upper end of 
the embryo sac. The pollen tube is seen entering at one side 
after turning from the micropyle along the outer wall of the 
nucellus. It contains two red bodies, the ‘‘X-Kérper” of Nawa- 
schin, in a disorganized condition. The tube is badly ruptured 
just below the tip. To the right of the pollen tube is the egg 
nucleus. One male nucleus is just out of the pollen tube and is 
partly under the egg nucleus. It is curved and is of about the 
same thickness throughout. At the lower right side of the figure, 
the upper polar nucleus is seen. Between the egg nucleus and 
the polar nucleus is a synergid. The long slightly curved male 
nucleus is seen in the cytoplasm of the ‘‘Endospermanlage.”’ 
It is smaller at the ends but does not have such an appearance of 
motility as the male nucleus shown in Fic. 2. 
Fic. 5 shows a slightly curved male nucleus in the cytoplasm 
of the “Endospermanlage” almost in contact with the upper 
polar nucleus. It is slightly curved and tapers back somewhat 
from the end nearer the polar nucleus. Both ends are rounded. 
A male nucleus at practically the same stage is shown in Fic. 7. 
FIG. 6 represents a rather unusual case of this stage. The male 
